Optimize The Blades Of The Dish Wind Power Generation System And Numerically Analyze The Aerodynamic Performance

With the development of social economy and industrialization,the demand for clean and renewable energy is increasing.The renewable energy industry has also been supported by governments,and wind energy has the characteristics of wide distribution,large reserves and low pollution.Nowadays,China has further promoted the development and utilization of distributed wind power,while the small wind-collecting wind power generation system has low starting wind speed and is easy to install and use on the spot.A horizontal axis parabolic wind power generation system is designed,which also has the function of concentrating power generation.In order to design the blades suitable for the gathering wind field,the wind gathering field is simulated by Fluent,and the average wind speed expansion ratio after gathering wind and the wind speed distribution in the gathering wind field are obtained.The inlet section of the air duct with large edge wind speed and low central wind speed is selected as the blade installation section.Based on the theoretical calculation of the aerodynamic performance of the blade,the annual maximum power generation is the target,and the wind speed of the blade is designed according to the distribution of the wind speed.The genetic algorithm is used to optimize the blade torsion angle and chord length in the wind gathering field.The three-dimensional modeling of wind turbine blades is completed by solidworks.The transient simulation analysis of the performance of the wind turbine is carried out by Fluent sliding grid technology.According to the calculated blade torque,the blade output power is calculated.Compare different blade design methods,different mounting sections,and unmodified blades,and analyze them with examples.The results show that the blade obtained by the design method adopted in this paper has higher output power in the wind gathering field.Combined with the wind frequency distribution curve and the solar radiation intensity,the total annual power generation of the wind gathering concentrating system is calculated,and the optimal structural parameters of the power generation system are obtained with the maximum annual power generation as the standard.